a×1

a × 1 is a simple mathematical expression representing the product of a variable or number represented by 'a' and the number 1. In mathematics, the number 1 is known as the multiplicative identity. This means that when any number or variable is multiplied by 1, the result is always the original number or variable. Therefore, the expression a × 1 simplifies to just 'a'. This property holds true for all real numbers, integers, rational numbers, and even complex numbers. The concept is fundamental in algebra and arithmetic, forming the basis for simplifying algebraic expressions and understanding the behavior of multiplication. It is a direct application of the identity property of multiplication. For instance, if 'a' represents the number 5, then 5 × 1 equals 5. If 'a' represents a variable like 'x', then x × 1 is equal to x. This identity property makes 1 a unique and crucial element in the system of numbers.